Execute application on system startup using Windows Service.

I am working on .Net framework. I have a Windows From Application that syncs the data to the server. Now I want to make it auto start at the time of System Startup. I tried to register it in system registry(regedit) but max of the time it fails to start my application at System Startup. Now someone suggest to make Windows Service and install it. But the thing is Windows Service doesn't support UI. Now I am not able to make my application auto start or I did not find any way where I can integrate Both Apps(Windows Form App and Windows Service). So, Please suggest me if there is any way to do so.